Quinoa

Quinoa, a species of goosefoot, is a grain crop grown primarily for its edible seeds. It is a pseudocereal rather than a true cereal, as it is not a member of the true grass family. Wikipedia

Quinoa grain has been called a superfood. Protein content is very high for a cereal/pseudo-cereal (14% by mass), but not as high as most beans and legumes. The protein content per 100 calories is higher than brown rice, potatoes, barley and millet, but is less than wild rice and oats.